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A094629 Numbers n with sum of digits(n) = 2. 1
2, 11, 20, 110, 200, 1100, 2000, 11000, 20000, 110000, 200000, 1100000, 2000000, 11000000, 20000000, 110000000, 200000000, 1100000000, 2000000000, 11000000000, 20000000000, 110000000000, 200000000000, 1100000000000 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Table of n, a(n) for n=1..24.

Index entries for linear recurrences with constant coefficients, signature (0,10).

FORMULA

G.f.: (2+11x)/(1-10x^2).

a(n) = (sqrt(10))^n*(1+11*sqrt(10)/20)+(-sqrt(10))^n*(1-11*sqrt(10)/20).

MATHEMATICA

LinearRecurrence[{0, 10}, {2, 11}, 40] (* Harvey P. Dale, Aug 16 2018 *)

CROSSREFS

Cf. A094628.

Sequence in context: A115095 A061907 A052216 * A081242 A071762 A288945

Adjacent sequences:  A094626 A094627 A094628 * A094630 A094631 A094632

KEYWORD

easy,nonn,base

AUTHOR

Paul Barry, May 15 2004

EXTENSIONS

Edited by Charles R Greathouse IV, Aug 03 2010

STATUS

approved

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Last modified February 21 11:25 EST 2019. Contains 320372 sequences. (Running on oeis4.)